ECET 340

Devry University - ECET 340: LAB#2 Keypad-LCD PROGRAMMING KEYPAD ON TWR-DEV-PERIPH. do{ mSDelay(15); PORTA = PORTA | 0x0F; //COLUMNS SET HIGH row = PORTA & 0xF0; //READ ROWS }while(row != 0x00); //MAKE SURE BUTTON IS NOT STILL HELD } //CLOSE WHILE(1) } //CLOSE MAIN /**********************SUBROUTINES***********/ void mSDelay(unsigned int itime){ unsigned int i; unsigned int j; for(i=0;i<itime;i++) for(j=0;j<1000;j++); } Lab Manual for “HCS12 Microcontroller and Embedded S...

Devry University - ECET 340: Quiz 1. Questions and Answers. Question 1 5 / 5 pts (TCO 1) A 4 x 5 keypad consists of four columns and five rows. 9 SPST switches. 20 SPST Normally Closed switches. Correct! four rows and five columns. ECET340 Week 1 lecture on keypad Question 2 0 / 5 pts (TCO 1) Which of the following is not an advantage of an LCD compared to an LED display? Ease of programming Correct Answer Limited to display numbers and a few characters You Answered Ability to...

Devry University - ECET 340: Final Review. Questions and Answers. Question : (TCO 1) A 4 x 5 keypad consists of Student Answer: 4 columns and 5 rows. 9 SPST switches. 20 SPST Normally Closed switches. Question 2 . Question : (TCO 1) The first command in the LCD initialization sequence is Student Answer: Data = 0x30, CSB = 0, E = ↓, RS = 1, R/W~ = 0. Data = 0x30, CSB = 0, E = ↓, RS = 0, R/W~ = 1. Data = 0...

Devry University - ECET 340: Quizzes 1 - 5. Questions and Answers. 1. Question : (TCO 1) In a typical keypad switch, bouncing occurs for how long? Student Answer: 5 to 20 ns 5 to 20 μs 5 to 20 ms 5 to 20 s Instructor Explanation: ECET340 Week 1 lecture on keypad Points Received: 5 of 5 Comments: Question 2 . Question : (TCO 1) After voltage is applied to an LCD element, what must be done first? Student Answer: Initialize the LCD Blank the LCD display Send a message to the L...